In this paper, a statistical analysis is performed on the data obtained from magnetic surveys. The purpose of this analysis is to introduce the U-spatial statistics as a method for obtaining geomagnetic anomaly areas and improving the results in the potential limit of iron. For this purpose, the 6000 magnetic data of the Baba-Ali iron limit on the west of the Sanandaj-Sirjan zone of Iran have been used. The U-spatial statistics method is a moving averaging method that considers the spatial position of data or geophysical properties in statistical analysis. To apply this method, the optimum values of U were first estimated on the raw magnetic data. Then the U-values map of the Earth’s magnetic field intensity for the upper and lower MI sensors were obtained by a kriging interpolation technique, and anomalous zones were determined by criteria U¯¯¯¯U¯ + SD. By subtracting these maps in the GIS environment, the gradient of the U-values of the Earth’s magnetic field on this anomaly was illustrated. The geomagnetic anomaly zones obtained from the U-spatial statistics method are in good agreement with the results of the previous surveys. Also, the study of two-dimensional sections to validate the results showed that this method could increase the resolution of anomalous areas with more confidence and help improve the results by reducing the intensity of background data and increase the intensity of anomalous data. In addition to proposing a drilling point, this method can propose an optimal area of the region to continue exploration operations by providing a potential area (U* ≥ 0.33).
2022 - Avenida Brasil 2162, Valparaíso, en la Facultad de Ingeniería de la Pontificia Universidad Católica de Valparaíso.